Tomoka Takeuchi

Tomoka Takeuchi
Canada Foundation for Innovation, Canada · Evaluation and Outcome Assessment

Ph.D.

About

30
Publications
6,331
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661
Citations
Citations since 2016
0 Research Items
167 Citations
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
2016201720182019202020212022051015202530
Introduction
Skills and Expertise

Publications

Publications (30)
Article
Abstract We investigated the relationship between a subject's self-rated lifestyle and their pattern of nocturnal rectal temperature. Fifty-five students participated in the study. Among several significant findings, irregularity and eveningness component of lifestyle (irregular and delayed sleep phase) showed a significant negative correlation wit...
Article
Full-text available
Sleep onset (SO) is cognitively and physiologically similar to rapid eye movement (REM) sleep, supporting the notion that REM sleep-related processes are 'covertly' active at this time. The objective was to determine if SO mentation is sensitive to REM sleep deprivation. Two-group cross-sectional design; sleep recordings for 3 nights. Standard slee...
Article
One of the key features of rapid-eye movement (REM) sleep is the presence of bursts of REMs. Sleep studies routinely use REMs to classify sleep stages. Moreover, REM count or density has been used in studies involving learning and various psychiatric disorders. Most of these studies have been based on the visual identification of REMs, which is gen...
Article
This article aims to overview briefly major arguments about dream generation from the point of view of the pros and cons of the main thesis that rapid eye movement (REM) sleep is indispensable for dreaming. The methodological issues observed in empirical dream research are also discussed. The evidence, as seen in phenomenological corroboration and...
Article
To be the first to compare EEG power spectra during sleep onset REM periods (SOREMP) and sleep onset NREM periods (NREMP) in normal individuals and relate this to dream appearance processes underlying these different types of sleep periods. Eight healthy undergraduates spent 7 consecutive nights in the sleep lab including 4 nights for SOREMP elicit...
Article
Use of the sleep interruption technique (SIT) to elicit sleep onset REM periods (SOREMPs) in normal individuals is introduced along with its theoretical bases, empirical findings, and potential applications. Capitalizing upon the circadian and ultradian nature of REM sleep, the SIT has been developed to examine various psychophysiological character...
Article
Full-text available
To further investigate mechanisms of isolated sleep paralysis (ISP) in normal individuals, we experimentally elicited ISPs by facilitating sleep onset REM periods (SOREMP), a prerequisite of ISPs, and examined behavioral and psychological measurements relating to ISP appearances. The multi-phasic sleep/wake schedule (MPS) began at approximately mid...
Article
Our goal is to develop an English version of the Dream Property Scale (DPS-E) based on the original normed scale in Japan (DPS-J). Factor analyses extracted four factors (Emotionality, Rationality, Activity, and Impression) and its factor structure was apparently similar to the DPS-J. The DPS-E was also shown to be related to EEG power spectral val...
Article
The hypothesis that there is a strict relationship between dreams and a specific rapid eye movement (REM) sleep mechanism is controversial. Many researchers have recently denied this relationship, yet none of their studies have simultaneously controlled both sleep length and depth prior to non-REM (NREM) and REM sleep awakenings, due to the natural...
Article
Nielsen's covert REM process model explains much of the mentation found in REM and NREM sleep, but stops short of postulating an interaction of waking cognitive processes with the dream mechanisms of REM sleep. It ranks with the Hobson et al. paper as a major theoretical advance. The Solms article does not surmount the ever-present problem of defin...
Article
不眠, 不充分な睡眠や付随する疲労は, 行動問題や情動障害に関連し, 二次的な学業問題, 集中力欠如, 成績悪化などに結びつく。そこで本研究では, 睡眠問題発現の予防学的側面をふまえ第1に, 睡眠習慣調査の因子分析により大学生の睡眠生活パタンを総合的に把握する尺度を構成した。第2に, 尺度得点のクラスター分析により睡眠習慣を分類し, 大学生の睡眠衛生上の潜在的問題点を検討した。因子分析により睡眠に関する3尺度一位相関連 (朝型・夜型と規則・不規則関連9項目), 質関連 (熟眠度関連6項目), 量関連 (睡眠の長さと傾眠性関連6項目) 一を抽出し, 通学など社会的要因との関連を示唆した。分類した6群のうち4群は, 睡眠不足, 睡眠状態誤認, 睡眠相後退など睡眠障害と共通点を示し, 時間的拘束の...
Article
There were no differences between Canada and Japan in the prevalence and symptoms of sleep paralysis (SP), but many more Canadians considered SP to be a dream. The difference was considered to be derived from the fact that there is a common expression for SP in Japan but there is not one in Canada. Then, we investigated why there are individuals wh...
Article
REM latency is usually 60-120 min, but under certain conditions, its latency may be less than 25 min, in which it is known as sleep onset REM period (SOREMP). In order to identify the factors responsible for the appearance of SOREMP, we used the nocturnal sleep interruption method to investigate whether REM propensity in normal nocturnal sleep, (i....
Article
睡眠はその生理的特徴からNREM睡眠とREM睡眠に2大別される.本研究ではこれらの睡眠相の前後に生じる自覚症状を検討し, 特にREM睡眠における生理的特徴と自覚症状の関係を論じた.実験は健常者14名に対し, 入眠時REM睡眠 (SOREMP) の誘発に「中途覚醒法」を適用し, 各睡眠期の前後に関西学院版眠気尺度 (KSS) と自覚症状調べを実施した.その結果, SOREMP出現前後はNREM睡眠のそれらに比較して, KSS値や「ねむい」, 「あくびが出る」, 「横になりたい」などの訴え率に有意に高い値を認めた.また, NREM睡眠出現後はSOREMPのそれに比較して, 「まぶたや筋がぴくぴくする」という訴え率が有意に高かった.したがって, SOREMP出現前は主観的眠気が強く, 眠気に関する...
Article
A questionnaire concerning their sleep-related lifestyle and mental health was mailed to people aged in their twenties to fifties living in the Fukushima (North East), Tokyo (Central, Metropolitan) and Okayama (West) areas of Japan. We classified the sleeping pattern of 3642 people (1702 men, 1940 women; mean age 41.3+/-10.67) by multivariational a...
Article
Full-text available
Although sleep paralysis had been treated as one of the symptoms of narcolepsy, recently it has become recognized as occurring frequently in normal individuals. However, among the few published studies that have examined sleep paralysis, there are great discrepancies in its reported prevalence. These discrepancies could be attributed to differences...
Article
The purpose of this study is to construct a rating scale, which measures dream properties, excludes extraneous variables caused by experimenter and/or subject, and reflects physiological activation during sleep. We selected 52 adjective items for the rating scale, expecting to reflect the four hypothetical properties of dreaming. We conducted polys...
Article
During an experiment on nocturnal sleep interruption, we observed a unique case of hallucination without sleep paralysis during the sleep-onset REM period in a normal individual. We documented the polysomnogram recorded during this hallucination. The polysomnogram showed a mixed pattern of Stages REM and W, with muscle-tone inhibition, rapid eye mo...
Article
During an experiment on nocturnal sleep interruption, we observed a unique case of hallucination without sleep paralysis during the sleep-onset REM period in a normal individual. We documented the polysomnogram recorded during this hallucination. The polysomnogram showed a mixed pattern of Stages REM and W, with muscle-tone inhibition, rapid eye mo...
Article
We interrupted the nocturnal sleep of human subjects for an hour and investigated the effect on body temperature (BT). The interruption elicited sleep onset rapid eye movement period (SOREMP). We compared the BT patterns obtained during nights with SOREMP at the second sleep onset (SOREMP nights) and those obtained during nights without SOREMPs (no...
Article
Full-text available
We elicited isolated sleep paralysis (ISP) from normal subjects by a nocturnal sleep interruption schedule. On four experimental nights, 16 subjects had their sleep interrupted for 60 minutes by forced awakening at the time when 40 minutes of nonrapid eye movement (NREM) sleep had elapsed from the termination of rapid eye movement (REM) sleep in th...

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